Merge pull request #8482 from cogip/qdec

boards/native/Makefile.features

boards/nucleo-f401/Makefile.features

boards/nucleo-f401/include/periph_conf.h

boards/nucleo-f446/Makefile.features

boards/nucleo-f446/include/periph_conf.h

cpu/native/include/periph_conf.h

cpu/native/periph/qdec.c

cpu/stm32_common/include/periph_cpu_common.h

cpu/stm32_common/periph/qdec.c

drivers/include/periph/qdec.h

tests/periph_qdec/Makefile

tests/periph_qdec/README.md

tests/periph_qdec/main.c